<!DOCTYPE html>



  


<html class="theme-next muse use-motion" lang="en">
<head>
  <meta charset="UTF-8"/>
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1"/>
<meta name="theme-color" content="#222">









<meta http-equiv="Cache-Control" content="no-transform" />
<meta http-equiv="Cache-Control" content="no-siteapp" />
















  
  
  <link href="/lib/fancybox/source/jquery.fancybox.css?v=2.1.5" rel="stylesheet" type="text/css" />







<link href="/lib/font-awesome/css/font-awesome.min.css?v=4.6.2" rel="stylesheet" type="text/css" />

<link href="/css/main.css?v=5.1.4" rel="stylesheet" type="text/css" />


  <link rel="apple-touch-icon" sizes="180x180" href="/images/apple-touch-icon-next.png?v=5.1.4">


  <link rel="icon" type="image/png" sizes="32x32" href="/images/favicon-32x32-next.png?v=5.1.4">


  <link rel="icon" type="image/png" sizes="16x16" href="/images/favicon-16x16-next.png?v=5.1.4">


  <link rel="mask-icon" href="/images/logo.svg?v=5.1.4" color="#222">





  <meta name="keywords" content="Hexo, NexT" />










<meta name="description" content="第七关注意：千万不能使用cat 来查看data.txt 查找文件中的字符串要用grep；直接输入1grep &amp;#x27;millionth&amp;#x27; data.txt  cvX2JJa4CFALtqS87jk27qwqGhBM9plV（通往第八关）第八关题目中说密码出现在data.txt中，且仅出现一次，因此需要出去重复的，使用命令uniq； uniq 命令，用于检查及删除文本文件中重复出现的行">
<meta property="og:type" content="article">
<meta property="og:title" content="Hexo">
<meta property="og:url" content="http://xu-xuran.gitee.io/2021/12/09/%E7%AC%AC%E4%B8%83%E5%85%B3/index.html">
<meta property="og:site_name" content="Hexo">
<meta property="og:description" content="第七关注意：千万不能使用cat 来查看data.txt 查找文件中的字符串要用grep；直接输入1grep &amp;#x27;millionth&amp;#x27; data.txt  cvX2JJa4CFALtqS87jk27qwqGhBM9plV（通往第八关）第八关题目中说密码出现在data.txt中，且仅出现一次，因此需要出去重复的，使用命令uniq； uniq 命令，用于检查及删除文本文件中重复出现的行">
<meta property="og:locale" content="en_US">
<meta property="article:published_time" content="2021-12-09T13:08:07.840Z">
<meta property="article:modified_time" content="2021-12-09T13:08:07.840Z">
<meta property="article:author" content="xuxuran">
<meta name="twitter:card" content="summary">



<script type="text/javascript" id="hexo.configurations">
  var NexT = window.NexT || {};
  var CONFIG = {
    root: '',
    scheme: 'Muse',
    version: '5.1.4',
    sidebar: {"position":"left","display":"post","offset":12,"b2t":false,"scrollpercent":false,"onmobile":false},
    fancybox: true,
    tabs: true,
    motion: {"enable":true,"async":false,"transition":{"post_block":"fadeIn","post_header":"slideDownIn","post_body":"slideDownIn","coll_header":"slideLeftIn","sidebar":"slideUpIn"}},
    duoshuo: {
      userId: '0',
      author: 'Author'
    },
    algolia: {
      applicationID: '',
      apiKey: '',
      indexName: '',
      hits: {"per_page":10},
      labels: {"input_placeholder":"Search for Posts","hits_empty":"We didn't find any results for the search: ${query}","hits_stats":"${hits} results found in ${time} ms"}
    }
  };
</script>



  <link rel="canonical" href="http://xu-xuran.gitee.io/2021/12/09/第七关/"/>





  <title> | Hexo</title>
  








<meta name="generator" content="Hexo 5.4.0"></head>

<body itemscope itemtype="http://schema.org/WebPage" lang="en">

  
  
    
  

  <div class="container sidebar-position-left page-post-detail">
    <div class="headband"></div>

    <header id="header" class="header" itemscope itemtype="http://schema.org/WPHeader">
      <div class="header-inner"><div class="site-brand-wrapper">
  <div class="site-meta ">
    

    <div class="custom-logo-site-title">
      <a href="/"  class="brand" rel="start">
        <span class="logo-line-before"><i></i></span>
        <span class="site-title">Hexo</span>
        <span class="logo-line-after"><i></i></span>
      </a>
    </div>
      
        <p class="site-subtitle"></p>
      
  </div>

  <div class="site-nav-toggle">
    <button>
      <span class="btn-bar"></span>
      <span class="btn-bar"></span>
      <span class="btn-bar"></span>
    </button>
  </div>
</div>

<nav class="site-nav">
  

  
    <ul id="menu" class="menu">
      
        
        <li class="menu-item menu-item-home">
          <a href="/%20" rel="section">
            
              <i class="menu-item-icon fa fa-fw fa-home"></i> <br />
            
            Home
          </a>
        </li>
      
        
        <li class="menu-item menu-item-archives">
          <a href="/archives/%20" rel="section">
            
              <i class="menu-item-icon fa fa-fw fa-archive"></i> <br />
            
            Archives
          </a>
        </li>
      

      
    </ul>
  

  
</nav>



 </div>
    </header>

    <main id="main" class="main">
      <div class="main-inner">
        <div class="content-wrap">
          <div id="content" class="content">
            

  <div id="posts" class="posts-expand">
    

  

  
  
  

  <article class="post post-type-normal" itemscope itemtype="http://schema.org/Article">
  
  
  
  <div class="post-block">
    <link itemprop="mainEntityOfPage" href="http://xu-xuran.gitee.io/2021/12/09/%E7%AC%AC%E4%B8%83%E5%85%B3/">

    <span hidden itemprop="author" itemscope itemtype="http://schema.org/Person">
      <meta itemprop="name" content="">
      <meta itemprop="description" content="">
      <meta itemprop="image" content="/images/avatar.gif">
    </span>

    <span hidden itemprop="publisher" itemscope itemtype="http://schema.org/Organization">
      <meta itemprop="name" content="Hexo">
    </span>

    
      <header class="post-header">

        
        
          <h1 class="post-title" itemprop="name headline"></h1>
        

        <div class="post-meta">
          <span class="post-time">
            
              <span class="post-meta-item-icon">
                <i class="fa fa-calendar-o"></i>
              </span>
              
                <span class="post-meta-item-text">Posted on</span>
              
              <time title="Post created" itemprop="dateCreated datePublished" datetime="2021-12-09T21:08:07+08:00">
                2021-12-09
              </time>
            

            

            
          </span>

          

          
            
          

          
          

          

          

          

        </div>
      </header>
    

    
    
    
    <div class="post-body" itemprop="articleBody">

      
      

      
        <h2 id="第七关"><a href="#第七关" class="headerlink" title="第七关"></a>第七关</h2><h3 id="注意：千万不能使用cat-来查看data-txt-查找文件中的字符串要用grep；"><a href="#注意：千万不能使用cat-来查看data-txt-查找文件中的字符串要用grep；" class="headerlink" title="注意：千万不能使用cat 来查看data.txt 查找文件中的字符串要用grep；"></a>注意：千万不能使用cat 来查看data.txt 查找文件中的字符串要用grep；</h3><h4 id="直接输入"><a href="#直接输入" class="headerlink" title="直接输入"></a>直接输入</h4><figure class="highlight plaintext"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">grep &#x27;millionth&#x27; data.txt</span><br></pre></td></tr></table></figure>

<h4 id="cvX2JJa4CFALtqS87jk27qwqGhBM9plV（通往第八关）"><a href="#cvX2JJa4CFALtqS87jk27qwqGhBM9plV（通往第八关）" class="headerlink" title="cvX2JJa4CFALtqS87jk27qwqGhBM9plV（通往第八关）"></a>cvX2JJa4CFALtqS87jk27qwqGhBM9plV（通往第八关）</h4><h2 id="第八关"><a href="#第八关" class="headerlink" title="第八关"></a>第八关</h2><h4 id="题目中说密码出现在data-txt中，且仅出现一次，因此需要出去重复的，使用命令uniq；"><a href="#题目中说密码出现在data-txt中，且仅出现一次，因此需要出去重复的，使用命令uniq；" class="headerlink" title="题目中说密码出现在data.txt中，且仅出现一次，因此需要出去重复的，使用命令uniq；"></a>题目中说密码出现在data.txt中，且仅出现一次，因此需要出去重复的，使用命令uniq；</h4><ul>
<li><p>uniq 命令，用于检查及删除文本文件中重复出现的行列，一般与 sort 命令结合使用。</p>
</li>
<li><p>-c 检查文件并删除文件中重复出现的行，并在行首显示该行重复出现的次数。</p>
</li>
<li><p>-u 仅显示出一次的行列。</p>
</li>
<li><p>sort 命令，用于将文本文件内容加以排序。</p>
<h4 id="因此输入-sort-data-txt-uniq-c"><a href="#因此输入-sort-data-txt-uniq-c" class="headerlink" title="因此输入 sort data.txt|uniq -c"></a>因此输入 sort data.txt|uniq -c</h4><h4 id="UsvVyFSfZZWbi6wgC7dAFyFuR6jQQUhR-第九关"><a href="#UsvVyFSfZZWbi6wgC7dAFyFuR6jQQUhR-第九关" class="headerlink" title="UsvVyFSfZZWbi6wgC7dAFyFuR6jQQUhR(第九关)"></a>UsvVyFSfZZWbi6wgC7dAFyFuR6jQQUhR(第九关)</h4><h2 id="第九关"><a href="#第九关" class="headerlink" title="第九关"></a>第九关</h2><h4 id="使用strings命令查找带有“-”的行；"><a href="#使用strings命令查找带有“-”的行；" class="headerlink" title="使用strings命令查找带有“=”的行；"></a>使用strings命令查找带有“=”的行；</h4><blockquote>
<p>strings命令，在对象文件或<a target="_blank" rel="noopener" href="https://www.zhihu.com/search?q=%E4%BA%8C%E8%BF%9B%E5%88%B6&search_source=Entity&hybrid_search_source=Entity&hybrid_search_extra=%7B%22sourceType%22:%22article%22,%22sourceId%22:100382314%7D">二进制</a>文件中查找可打印的字符串</p>
</blockquote>
</li>
</ul>
<h4 id="直接输入-strings-data-txt-grep’-’"><a href="#直接输入-strings-data-txt-grep’-’" class="headerlink" title="直接输入 strings data.txt|grep’=’"></a>直接输入 strings data.txt|grep’=’</h4><h3 id="truKLdjsbJ5g7yyJ2X2R0o3a5HQJFuLk-第十关"><a href="#truKLdjsbJ5g7yyJ2X2R0o3a5HQJFuLk-第十关" class="headerlink" title="truKLdjsbJ5g7yyJ2X2R0o3a5HQJFuLk(第十关)"></a>truKLdjsbJ5g7yyJ2X2R0o3a5HQJFuLk(第十关)</h3><h2 id="第十关"><a href="#第十关" class="headerlink" title="第十关"></a>第十关</h2><h4 id=""><a href="#" class="headerlink" title=""></a></h4><h4 id="先直接查看ls"><a href="#先直接查看ls" class="headerlink" title="先直接查看ls"></a>先直接查看ls</h4><h4 id="然后用cat查看该文件"><a href="#然后用cat查看该文件" class="headerlink" title="然后用cat查看该文件"></a>然后用cat查看该文件</h4><h4 id="然后再解密base64-d-data-txt"><a href="#然后再解密base64-d-data-txt" class="headerlink" title="然后再解密base64 -d data.txt"></a>然后再解密base64 -d data.txt</h4><h4 id="IFukwKGsFW8MOq3IRFqrxE1hxTNEbUPR（第11关）"><a href="#IFukwKGsFW8MOq3IRFqrxE1hxTNEbUPR（第11关）" class="headerlink" title="IFukwKGsFW8MOq3IRFqrxE1hxTNEbUPR（第11关）"></a>IFukwKGsFW8MOq3IRFqrxE1hxTNEbUPR（第11关）</h4><h2 id="第十一关"><a href="#第十一关" class="headerlink" title="第十一关"></a>第十一关</h2><h4 id="提示密码在-data-txt-中，所有字母都旋转了-13-个位置。也就是说，a-相当于-n。"><a href="#提示密码在-data-txt-中，所有字母都旋转了-13-个位置。也就是说，a-相当于-n。" class="headerlink" title="提示密码在 data.txt 中，所有字母都旋转了 13 个位置。也就是说，a 相当于 n。"></a>提示密码在 data.txt 中，所有字母都旋转了 13 个位置。也就是说，a 相当于 n。</h4><h4 id="使用命令-tr，先-cat-获取文本字符串："><a href="#使用命令-tr，先-cat-获取文本字符串：" class="headerlink" title="使用命令 tr，先 cat 获取文本字符串："></a>使用命令 tr，先 cat 获取文本字符串：</h4><figure class="highlight plaintext"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">cat data.txt|tr &#x27;a-zA-Z&#x27; &#x27;n-za-mN-ZA-M&#x27;</span><br></pre></td></tr></table></figure>

<blockquote>
<p>tr 命令用于转换或删除文件中的字符。</p>
</blockquote>
<h4 id="5Te8Y4drgCRfCx8ugdwuEX8KFC6k2EUu-第十二关"><a href="#5Te8Y4drgCRfCx8ugdwuEX8KFC6k2EUu-第十二关" class="headerlink" title="5Te8Y4drgCRfCx8ugdwuEX8KFC6k2EUu(第十二关)"></a>5Te8Y4drgCRfCx8ugdwuEX8KFC6k2EUu(第十二关)</h4>
      
    </div>
    
    
    

    

    

    

    <footer class="post-footer">
      

      
      
      

      
        <div class="post-nav">
          <div class="post-nav-next post-nav-item">
            
              <a href="/2021/12/07/1-6%E5%85%B3%E6%89%93%E9%9D%B6/" rel="next" title="">
                <i class="fa fa-chevron-left"></i> 
              </a>
            
          </div>

          <span class="post-nav-divider"></span>

          <div class="post-nav-prev post-nav-item">
            
              <a href="/2021/12/10/title%20PTA%20%207-5-5%20%E8%8B%B1%E6%96%87%E5%8D%95%E8%AF%8D%E6%8E%92%E5%BA%8F/" rel="prev" title="">
                 <i class="fa fa-chevron-right"></i>
              </a>
            
          </div>
        </div>
      

      
      
    </footer>
  </div>
  
  
  
  </article>



    <div class="post-spread">
      
    </div>
  </div>


          </div>
          


          

  



        </div>
        
          
  
  <div class="sidebar-toggle">
    <div class="sidebar-toggle-line-wrap">
      <span class="sidebar-toggle-line sidebar-toggle-line-first"></span>
      <span class="sidebar-toggle-line sidebar-toggle-line-middle"></span>
      <span class="sidebar-toggle-line sidebar-toggle-line-last"></span>
    </div>
  </div>

  <aside id="sidebar" class="sidebar">
    
    <div class="sidebar-inner">

      

      
        <ul class="sidebar-nav motion-element">
          <li class="sidebar-nav-toc sidebar-nav-active" data-target="post-toc-wrap">
            Table of Contents
          </li>
          <li class="sidebar-nav-overview" data-target="site-overview-wrap">
            Overview
          </li>
        </ul>
      

      <section class="site-overview-wrap sidebar-panel">
        <div class="site-overview">
          <div class="site-author motion-element" itemprop="author" itemscope itemtype="http://schema.org/Person">
            
              <p class="site-author-name" itemprop="name"></p>
              <p class="site-description motion-element" itemprop="description"></p>
          </div>

          <nav class="site-state motion-element">

            
              <div class="site-state-item site-state-posts">
              
                <a href="/archives/%20%7C%7C%20archive">
              
                  <span class="site-state-item-count">6</span>
                  <span class="site-state-item-name">posts</span>
                </a>
              </div>
            

            

            
              
              
              <div class="site-state-item site-state-tags">
                
                  <span class="site-state-item-count">2</span>
                  <span class="site-state-item-name">tags</span>
                
              </div>
            

          </nav>

          

          

          
          

          
          

          

        </div>
      </section>

      
      <!--noindex-->
        <section class="post-toc-wrap motion-element sidebar-panel sidebar-panel-active">
          <div class="post-toc">

            
              
            

            
              <div class="post-toc-content"><ol class="nav"><li class="nav-item nav-level-2"><a class="nav-link" href="#%E7%AC%AC%E4%B8%83%E5%85%B3"><span class="nav-number">1.</span> <span class="nav-text">第七关</span></a><ol class="nav-child"><li class="nav-item nav-level-3"><a class="nav-link" href="#%E6%B3%A8%E6%84%8F%EF%BC%9A%E5%8D%83%E4%B8%87%E4%B8%8D%E8%83%BD%E4%BD%BF%E7%94%A8cat-%E6%9D%A5%E6%9F%A5%E7%9C%8Bdata-txt-%E6%9F%A5%E6%89%BE%E6%96%87%E4%BB%B6%E4%B8%AD%E7%9A%84%E5%AD%97%E7%AC%A6%E4%B8%B2%E8%A6%81%E7%94%A8grep%EF%BC%9B"><span class="nav-number">1.1.</span> <span class="nav-text">注意：千万不能使用cat 来查看data.txt 查找文件中的字符串要用grep；</span></a><ol class="nav-child"><li class="nav-item nav-level-4"><a class="nav-link" href="#%E7%9B%B4%E6%8E%A5%E8%BE%93%E5%85%A5"><span class="nav-number">1.1.1.</span> <span class="nav-text">直接输入</span></a></li><li class="nav-item nav-level-4"><a class="nav-link" href="#cvX2JJa4CFALtqS87jk27qwqGhBM9plV%EF%BC%88%E9%80%9A%E5%BE%80%E7%AC%AC%E5%85%AB%E5%85%B3%EF%BC%89"><span class="nav-number">1.1.2.</span> <span class="nav-text">cvX2JJa4CFALtqS87jk27qwqGhBM9plV（通往第八关）</span></a></li></ol></li></ol></li><li class="nav-item nav-level-2"><a class="nav-link" href="#%E7%AC%AC%E5%85%AB%E5%85%B3"><span class="nav-number">2.</span> <span class="nav-text">第八关</span></a><ol class="nav-child"><li class="nav-item nav-level-4"><a class="nav-link" href="#%E9%A2%98%E7%9B%AE%E4%B8%AD%E8%AF%B4%E5%AF%86%E7%A0%81%E5%87%BA%E7%8E%B0%E5%9C%A8data-txt%E4%B8%AD%EF%BC%8C%E4%B8%94%E4%BB%85%E5%87%BA%E7%8E%B0%E4%B8%80%E6%AC%A1%EF%BC%8C%E5%9B%A0%E6%AD%A4%E9%9C%80%E8%A6%81%E5%87%BA%E5%8E%BB%E9%87%8D%E5%A4%8D%E7%9A%84%EF%BC%8C%E4%BD%BF%E7%94%A8%E5%91%BD%E4%BB%A4uniq%EF%BC%9B"><span class="nav-number">2.0.1.</span> <span class="nav-text">题目中说密码出现在data.txt中，且仅出现一次，因此需要出去重复的，使用命令uniq；</span></a></li><li class="nav-item nav-level-4"><a class="nav-link" href="#%E5%9B%A0%E6%AD%A4%E8%BE%93%E5%85%A5-sort-data-txt-uniq-c"><span class="nav-number">2.0.2.</span> <span class="nav-text">因此输入 sort data.txt|uniq -c</span></a></li><li class="nav-item nav-level-4"><a class="nav-link" href="#UsvVyFSfZZWbi6wgC7dAFyFuR6jQQUhR-%E7%AC%AC%E4%B9%9D%E5%85%B3"><span class="nav-number">2.0.3.</span> <span class="nav-text">UsvVyFSfZZWbi6wgC7dAFyFuR6jQQUhR(第九关)</span></a></li></ol></li></ol></li><li class="nav-item nav-level-2"><a class="nav-link" href="#%E7%AC%AC%E4%B9%9D%E5%85%B3"><span class="nav-number">3.</span> <span class="nav-text">第九关</span></a><ol class="nav-child"><li class="nav-item nav-level-4"><a class="nav-link" href="#%E4%BD%BF%E7%94%A8strings%E5%91%BD%E4%BB%A4%E6%9F%A5%E6%89%BE%E5%B8%A6%E6%9C%89%E2%80%9C-%E2%80%9D%E7%9A%84%E8%A1%8C%EF%BC%9B"><span class="nav-number">3.0.1.</span> <span class="nav-text">使用strings命令查找带有“&#x3D;”的行；</span></a></li><li class="nav-item nav-level-4"><a class="nav-link" href="#%E7%9B%B4%E6%8E%A5%E8%BE%93%E5%85%A5-strings-data-txt-grep%E2%80%99-%E2%80%99"><span class="nav-number">3.0.2.</span> <span class="nav-text">直接输入 strings data.txt|grep’&#x3D;’</span></a></li></ol></li><li class="nav-item nav-level-3"><a class="nav-link" href="#truKLdjsbJ5g7yyJ2X2R0o3a5HQJFuLk-%E7%AC%AC%E5%8D%81%E5%85%B3"><span class="nav-number">3.1.</span> <span class="nav-text">truKLdjsbJ5g7yyJ2X2R0o3a5HQJFuLk(第十关)</span></a></li></ol></li><li class="nav-item nav-level-2"><a class="nav-link" href="#%E7%AC%AC%E5%8D%81%E5%85%B3"><span class="nav-number">4.</span> <span class="nav-text">第十关</span></a><ol class="nav-child"><li class="nav-item nav-level-4"><a class="nav-link"><span class="nav-number">4.0.1.</span> <span class="nav-text"></span></a></li><li class="nav-item nav-level-4"><a class="nav-link" href="#%E5%85%88%E7%9B%B4%E6%8E%A5%E6%9F%A5%E7%9C%8Bls"><span class="nav-number">4.0.2.</span> <span class="nav-text">先直接查看ls</span></a></li><li class="nav-item nav-level-4"><a class="nav-link" href="#%E7%84%B6%E5%90%8E%E7%94%A8cat%E6%9F%A5%E7%9C%8B%E8%AF%A5%E6%96%87%E4%BB%B6"><span class="nav-number">4.0.3.</span> <span class="nav-text">然后用cat查看该文件</span></a></li><li class="nav-item nav-level-4"><a class="nav-link" href="#%E7%84%B6%E5%90%8E%E5%86%8D%E8%A7%A3%E5%AF%86base64-d-data-txt"><span class="nav-number">4.0.4.</span> <span class="nav-text">然后再解密base64 -d data.txt</span></a></li><li class="nav-item nav-level-4"><a class="nav-link" href="#IFukwKGsFW8MOq3IRFqrxE1hxTNEbUPR%EF%BC%88%E7%AC%AC11%E5%85%B3%EF%BC%89"><span class="nav-number">4.0.5.</span> <span class="nav-text">IFukwKGsFW8MOq3IRFqrxE1hxTNEbUPR（第11关）</span></a></li></ol></li></ol></li><li class="nav-item nav-level-2"><a class="nav-link" href="#%E7%AC%AC%E5%8D%81%E4%B8%80%E5%85%B3"><span class="nav-number">5.</span> <span class="nav-text">第十一关</span></a><ol class="nav-child"><li class="nav-item nav-level-4"><a class="nav-link" href="#%E6%8F%90%E7%A4%BA%E5%AF%86%E7%A0%81%E5%9C%A8-data-txt-%E4%B8%AD%EF%BC%8C%E6%89%80%E6%9C%89%E5%AD%97%E6%AF%8D%E9%83%BD%E6%97%8B%E8%BD%AC%E4%BA%86-13-%E4%B8%AA%E4%BD%8D%E7%BD%AE%E3%80%82%E4%B9%9F%E5%B0%B1%E6%98%AF%E8%AF%B4%EF%BC%8Ca-%E7%9B%B8%E5%BD%93%E4%BA%8E-n%E3%80%82"><span class="nav-number">5.0.1.</span> <span class="nav-text">提示密码在 data.txt 中，所有字母都旋转了 13 个位置。也就是说，a 相当于 n。</span></a></li><li class="nav-item nav-level-4"><a class="nav-link" href="#%E4%BD%BF%E7%94%A8%E5%91%BD%E4%BB%A4-tr%EF%BC%8C%E5%85%88-cat-%E8%8E%B7%E5%8F%96%E6%96%87%E6%9C%AC%E5%AD%97%E7%AC%A6%E4%B8%B2%EF%BC%9A"><span class="nav-number">5.0.2.</span> <span class="nav-text">使用命令 tr，先 cat 获取文本字符串：</span></a></li><li class="nav-item nav-level-4"><a class="nav-link" href="#5Te8Y4drgCRfCx8ugdwuEX8KFC6k2EUu-%E7%AC%AC%E5%8D%81%E4%BA%8C%E5%85%B3"><span class="nav-number">5.0.3.</span> <span class="nav-text">5Te8Y4drgCRfCx8ugdwuEX8KFC6k2EUu(第十二关)</span></a></li></ol></li></ol></li></ol></div>
            

          </div>
        </section>
      <!--/noindex-->
      

      

    </div>
  </aside>


        
      </div>
    </main>

    <footer id="footer" class="footer">
      <div class="footer-inner">
        <div class="copyright">&copy; <span itemprop="copyrightYear">2021</span>
  <span class="with-love">
    <i class="fa fa-user"></i>
  </span>
  <span class="author" itemprop="copyrightHolder">xuxuran</span>

  
</div>


  <div class="powered-by">Powered by <a class="theme-link" target="_blank" href="https://hexo.io">Hexo</a></div>



  <span class="post-meta-divider">|</span>



  <div class="theme-info">Theme &mdash; <a class="theme-link" target="_blank" href="https://github.com/iissnan/hexo-theme-next">NexT.Muse</a> v5.1.4</div>




        







        
      </div>
    </footer>

    
      <div class="back-to-top">
        <i class="fa fa-arrow-up"></i>
        
      </div>
    

    

  </div>

  

<script type="text/javascript">
  if (Object.prototype.toString.call(window.Promise) !== '[object Function]') {
    window.Promise = null;
  }
</script>









  












  
  
    <script type="text/javascript" src="/lib/jquery/index.js?v=2.1.3"></script>
  

  
  
    <script type="text/javascript" src="/lib/fastclick/lib/fastclick.min.js?v=1.0.6"></script>
  

  
  
    <script type="text/javascript" src="/lib/jquery_lazyload/jquery.lazyload.js?v=1.9.7"></script>
  

  
  
    <script type="text/javascript" src="/lib/velocity/velocity.min.js?v=1.2.1"></script>
  

  
  
    <script type="text/javascript" src="/lib/velocity/velocity.ui.min.js?v=1.2.1"></script>
  

  
  
    <script type="text/javascript" src="/lib/fancybox/source/jquery.fancybox.pack.js?v=2.1.5"></script>
  


  


  <script type="text/javascript" src="/js/src/utils.js?v=5.1.4"></script>

  <script type="text/javascript" src="/js/src/motion.js?v=5.1.4"></script>



  
  

  
  <script type="text/javascript" src="/js/src/scrollspy.js?v=5.1.4"></script>
<script type="text/javascript" src="/js/src/post-details.js?v=5.1.4"></script>



  


  <script type="text/javascript" src="/js/src/bootstrap.js?v=5.1.4"></script>



  


  




	





  





  












  





  

  

  

  
  

  

  

  

</body>
</html>
